Genus of citrus is________?

The total revenue of a film less all its economic costs is called________?

The plants which, grow neither in dry nor in wet condition are________?

A channel artificially constructed for water conveyance of appreciable quantities with no problem of silting and scouring is called ________?

The interaction of polysaccharides form ________?

Which method of irrigation is possible under the economical conditions of Pakistan ________?